30 servings divided among 4 children equals 7.5 servings each. Especially when it's been warmer weather isn't excessive imo - plus it's actually less as op and dad probably had some too.
Also most squash is sugar free now. Squash with sugar in is usually premium range and priced accordingly - think op would have said if that were the case.
Regarding "need" no, nobody "needs" less healthy food but all of us like it, in the uk it's relatively easily and cheaply available (for now) and these children will eventually be able to buy it for themselves, indeed most teens have money to do so. As I said in previous post, I've seen SO many times parents not allowing children unhealthy snacks or treats or VERY rarely (like birthdays, Christmas and weddings only) and the majority of those children have gone on to have a deeply unhealthy attitude to these foods. Makes far more sense to teach "OK in moderation" rather than turn them into craved "forbidden fruit".
However I've certainly met parents who CLAIM their DC "don't like" any junk food - I've then socialised with these children as adults or hosted them or taken them places or dd has told me about their eating habits when parents not about - doesn't bear out in most cases.
Have to agree with MissCharley too re fruit not satisfying genuine hunger which again as in previous post (I'm actually wondering if it's invisible and I'm not the only person that said this either - but the trying to appear virtuous posters are ignoring) TEENS NEED MORE CALORIES the reason fruit is seen as a good snack normally is because it's low cal. So they may well have fruit (my dd loves her fruit it was fruit I'd bought for ME she 'nicked') but STILL be hungry.
Those saying "they aren't allowed to just help themselves" how old are your DC? Primary age I can understand you still being in the process of teaching them good habits, but by teens especially late teens they should be self regulating to at least SOME degree (plus again - teens need more fuel).
I also find it interesting that the obesity crisis is happening now when people are far more critical of food than ever before. Can't possibly be to do with the reduction in hours spent on PE in school, lack of cooking skills, hell even not letting teens cook, fewer safe open spaces for children to play... But yea it's ONLY down to squash and crisps in the house 🙄